Vibration control system

ABSTRACT

An apparatus includes a retainer, a rotational portion that is connected to the retainer so that it is able to rotate with respect to the retainer on a rotation axis, a rotor that is connected to the rotational portion for rotation in unison with the rotational portion, and a caliper assembly that is connected to the retainer so that the caliper assembly is able to move according to a line of action. The apparatus also includes a damper assembly that is connected to the retainer and is connected to the caliper assembly to regulate movement of the caliper assembly with respect to the retainer along the line of action, wherein the caliper assembly and the damper assembly cooperate to define a mass damper system that damps vibration of the rotational portion.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of U.S. Provisional Application No. 63/048,795, filed on Jul. 7, 2020, the content of which is hereby incorporated by reference in its entirety for all purposes.

TECHNICAL FIELD

This disclosure relates to vibration control systems.

BACKGROUND

Motion control systems support a sprung mass with respect to an unsprung mass in order to reduce transmission of vibrations from the unsprung mass to the sprung mass. The sprung mass typically includes a body having a compartment. The unsprung mass typically includes and components that support the body and are movable relative to the body.

A vibration control system can be used to reduce unwanted vibration effects. The unwanted vibration effects are applied to a primary mass. A secondary mass, which is referred to herein as a damper mass, is smaller than the first mass and is connected to the primary mass by a damper assembly having characteristics that are selected (e.g., tuned) so that movement of the damper mass will result in vibrations that reduce the unwanted vibration effects. The damper assembly may be configured so that movement of the damper mass is out of phase with and/or opposite in direction relative to the unwanted vibration effects in order to reduce them.

SUMMARY

A first aspect of the disclosure is an apparatus that includes a knuckle, a wheel that is connected to the knuckle so that it is able to rotate with respect to the knuckle on a rotation axis, a brake rotor that is connected to the wheel for rotation with the wheel, and a caliper assembly that is connected to the knuckle so that the caliper assembly is able to move according to a line of action. The apparatus also includes a damper assembly that is connected to the knuckle and is connected to the caliper assembly to regulate movement of the caliper assembly with respect to the knuckle along the line of action, wherein the caliper assembly and the damper assembly cooperate to define a mass damper system that damps vibration of the wheel.

In some implementations of the apparatus according to the first aspect of the disclosure, the damper assembly includes a damper and a spring. In some implementations of the apparatus according to the first aspect of the disclosure, the spring biases the caliper assembly toward a neutral position and the damper resists movement of the caliper assembly with respect to the knuckle. In some implementations of the apparatus according to the first aspect of the disclosure, the caliper assembly is connected to the knuckle by a linear bearing that restrains movement of the caliper assembly according to the line of action.

In some implementations of the apparatus according to the first aspect of the disclosure, the line of action extends radially with respect to the rotation axis. In some implementations of the apparatus according to the first aspect of the disclosure, the line of action is generally vertical.

In some implementations of the apparatus according to the first aspect of the disclosure, the caliper assembly includes an outer caliper plate, an inner caliper plate, and an actuator that is configured to move the inner caliper plate and the outer caliper plate into engagement with a first rotor surface and a second rotor surface of the brake rotor, and the first rotor surface and the second rotor surface of the brake rotor are formed from a brake friction material.

A second aspect of the disclosure is an apparatus that includes a knuckle, a wheel that is connected to the knuckle so that it is able to rotate with respect to the knuckle on a rotation axis, a brake rotor that is connected to the wheel for rotation with the wheel, and a caliper assembly that is connected to the knuckle so that the caliper assembly is able to translate with respect to the knuckle, the wheel, and the brake rotor. The caliper assembly includes a first caliper part that is located on an inboard side of the brake rotor, a second caliper part that is located on an outboard side of the brake rotor, and an actuator that is configured to move the caliper assembly into engagement with the brake rotor. The apparatus also includes a mass damper system having a damper mass and a damper assembly, wherein the caliper assembly is part of the damper mass, the damper assembly is connected to the knuckle, the damper assembly is connected to the damper mass, and the damper assembly is configured to regulate movement of the damper mass with respect to the knuckle to damp vibration of the wheel.

In some implementations of the apparatus according to the second aspect of the disclosure, the first caliper part and the second caliper part are each a ring-like structure that extends around a central opening. In some implementations of the apparatus according to the second aspect of the disclosure, the first caliper part includes a first caliper surface that is engageable with the brake rotor, the second caliper part includes a second caliper surface that is engageable with the brake rotor, and the first caliper surface and the second caliper surface are formed from a ferrous material.

In some implementations of the apparatus according to the second aspect of the disclosure, the brake rotor includes a support disk, the brake rotor includes a first rotor surface that is formed from a brake friction material, the brake rotor includes a second rotor surface that is formed from the brake friction material, the first rotor surface is located on a first side of the support disk, and the second rotor surface is located on a second side of the support disk. In some implementations of the apparatus according to the second aspect of the disclosure, the brake friction material includes an organic material and a binder.

In some implementations of the apparatus according to the second aspect of the disclosure, a mass of the caliper assembly is greater than a mass of the brake rotor. In some implementations of the apparatus according to the second aspect of the disclosure, a thermal mass of the caliper assembly is greater than a thermal mass of the brake rotor.

In some implementations of the apparatus according to the second aspect of the disclosure, the damper assembly includes a damper and a spring, the spring biases the damper mass toward a neutral position, and the damper resists movement of the damper mass with respect to the knuckle. In some implementations of the apparatus according to the second aspect of the disclosure, the damper mass is connected to the knuckle by a linear bearing that restrains the damper mass to linear movement with respect to the knuckle.

A third aspect of the disclosure is an apparatus that includes a support structure and a wheel that is rotatable with respect to the support structure. A brake rotor is connected to the wheel for rotation with the wheel. The brake rotor has a first rotor surface that is formed from a brake friction material and a second rotor surface that is formed from the brake friction material. The apparatus also includes an inner caliper plate that has a first caliper surface, wherein the inner caliper plate is located on a first side of the brake rotor. The apparatus also includes an outer caliper plate that has a second caliper surface, wherein the outer caliper plate is located on a second side of the brake rotor. The apparatus also includes an actuator that is configured to move the inner caliper plate and the outer caliper plate into engagement with the brake rotor. The mass damper system has a damper mass and a damper assembly. The inner caliper plate and the outer caliper plate are part of the damper mass. The damper assembly is connected to the support structure and the damper assembly is connected to the damper mass. The damper assembly is configured to regulate movement of the damper mass with respect to the support structure to damp vibration of the wheel.

In some implementations of the apparatus according to the third aspect of the disclosure, the damper assembly includes a damper and a spring. In some implementations of the apparatus according to the third aspect of the disclosure, the spring biases the damper mass toward a neutral position, and the damper resists movement of the damper mass with respect to the support structure. In some implementations of the apparatus according to the third aspect of the disclosure, the damper mass is connected to the support structure by a linear bearing that restrains the damper mass to linear movement with respect to the support structure.

In some implementations of the apparatus according to the third aspect of the disclosure, the brake friction material includes an organic material and a binder. In some implementations of the apparatus according to the third aspect of the disclosure, the brake friction material is a non-asbestos organic brake friction material. In some implementations of the apparatus according to the third aspect of the disclosure, the brake friction material is a semi-metallic brake friction material. In some implementations of the apparatus according to the third aspect of the disclosure, the brake friction material is a ceramic brake friction material. In some implementations of the apparatus according to the third aspect of the disclosure, the brake friction material is a sintered metal brake friction material.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram that shows a portion of a vehicle.

FIG. 2 is a schematic rear view cross-section illustration that shows a wheel assembly, a brake system, and a mass damper system.

FIG. 3 is a schematic side view illustration that shows a brake system and a mass damper system according to a first example implementation.

FIG. 4 is a schematic top view cross-section illustration that shows the brake system and the mass damper system according to the first example implementation.

FIG. 5 is a schematic side view illustration that shows a brake system and a mass damper system according to a second example implementation.

FIG. 6 is a schematic top view cross-section illustration that shows the brake system and the mass damper system according to the second example implementation.

FIG. 7 is a schematic side view illustration that shows a brake system and a mass damper system according to a third example implementation.

FIG. 8 is a schematic top view cross-section illustration that shows the brake system and the mass damper system according to the third example implementation.

FIG. 9 is a schematic side view illustration that shows a brake system and a mass damper system according to a fourth example implementation.

FIG. 10 is a schematic top view cross-section illustration that shows the brake system and the mass damper system according to the fourth example implementation.

FIG. 11 is a schematic top view cross-section illustration that shows a brake caliper assembly and a rotor having tapered engagement surfaces.

FIG. 12 is a block diagram that shows a mass damper control system according to an example.

FIG. 13 is a block diagram that shows an example of a controller.

DETAILED DESCRIPTION

In the suspension systems that are described herein, a mass damper system is connected to a wheel of a vehicle to reduce unwanted vibration effects that are experienced by the unsprung mass of the vehicle. The unwanted vibration effects may, for example, include or contribute to causing wheel hop. In the suspension systems that are described herein, the mass damper system uses some of the braking components of the vehicle as all of or part of the damper mass.

In a typical conventional disk brake system for an automobile, a rotor is connected to the wheel so that it rotates in unison with the wheel, and a caliper assembly is mounted (e.g., supported by a suspension knuckle) so that it does not rotate with the wheel. The rotor is a large, disk-like structure that is typically formed from a ferrous material that has a high thermal conductivity such as cast iron. The large mass and high thermal conductivity of the rotor allow it to serve as a heat sink. The caliper assembly includes a caliper housing, one or more actuators (e.g., hydraulic pistons), and brake pads that are moved into engagement with the rotor by the actuators to apply braking force. Brake pads have a low thermal conductivity as compared to the rotor, because of the materials typically chosen for the brake pads.

In typical conventional disk brake systems, the brake pads are formed from a brake friction material. The term “brake friction material” is recognized in the art as referring to a class of composite materials that are suitable for use in friction brake pads to generate braking forces by engagement with a brake rotor. Commonly used brake friction materials are composite materials that include non-asbestos organic materials in a binder, including non-metallic brake friction materials and semi-metallic brake friction materials. Other brake friction materials include sintered metal brake friction materials and ceramic brake friction materials. In typical implementations, the mass of the rotor is larger than the mass of the caliper assembly, and the thermal mass of the rotor is likewise larger than the thermal mass of the caliper assembly so that the rotor serves as the primary heat sink for absorbing heat created during braking in conventional disk brake systems.

In some of the suspension systems that are described herein, a brake system is configured so that the mass of the components that are used as part of the damper mass of the mass damper system is increased relative to conventional disk brake system designs. As an example, a rotor is mounted so that it rotates in unison with a wheel, as in a conventional disk brake system, but includes engaging surfaces formed from a brake friction material, has significantly less mass than a conventional disk brake rotor, and does not serve as the primary heat sink of the brake system. The caliper assembly includes inner and outer caliper plates, which may be ring-like structures (E.g., caliper rings). The engaging surfaces of the inner and outer caliper plates may be formed from a ferrous material. The ferrous material may be, for example, an iron-based metal or metal alloy. The engaging surfaces of the inner and outer caliper plates may alternatively be formed from other materials, such as a metal matrix composite. In this example, the caliper plates therefore have a much higher thermal conductivity than the brake friction material of the rotor. As a result, the caliper assembly has a significantly larger mass than a traditional disk brake caliper housing and brake pads, and the inner and outer caliper plates structures serve as the primary heat sink of the brake system.

FIG. 1 is a schematic illustration that shows a part of a vehicle 100. As an example, the vehicle 100 may be a conventional road-going vehicle that is supported by wheels and tires (e.g., four wheels and tires). As an example, the vehicle 100 may be a passenger vehicle that includes a passenger compartment that is configured to carry one or more passengers. As another example, the vehicle 100 may be a cargo vehicle that is configured to carry cargo items in a cargo compartment.

In the illustrated example, the vehicle 100 includes a vehicle body structure 102, a wheel assembly 104, a suspension system 106, a propulsion system 108, a steering system 110, a brake system 112, and a mass damper system 114.

The vehicle body structure 102 includes components that are part of the sprung mass of the vehicle 100. The vehicle body structure 102 may be a multi-part structure. The vehicle body structure 102 may include a frame, a subframe, a unibody, a body, a monocoque, and/or other types of vehicle frame and body structures. The vehicle body structure 102 may include or support components that define internal structural portions of the vehicle (e.g., frame rails, structural pillars, etc.), and external aesthetic portions of the vehicle (e.g., body panels). The vehicle body structure 102 may, for example, include or define a passenger compartment for carrying passengers. The vehicle body structure 102 may, for example, include or define a cargo compartment for carrying cargo.

The wheel assembly 104 includes a wheel 116, a tire 118, and a wheel hub 120. The wheel 116, the tire 118, and the wheel hub 120 are all conventional components. For example, the wheel 116 may be a steel wheel of conventional design that supports the tire 118, which may be a pneumatic tire. The wheel hub 120 serves as an interface between non-rotating components of the suspension system 106 of the vehicle 100, and rotating components, including the wheel 116 and the tire 118. As an example, the wheel hub 120 may include a bearing that allows rotation relative to components of the suspension system 106.

The suspension system 106 may include a knuckle 122, an upper control arm 124, a lower control arm 126, and a suspension damper 128. The knuckle 122 is located partly inside an internal space of the wheel 116 and serves as a support structure for components of the wheel assembly 104 and the brake system 112. The knuckle 122 is connected to the wheel hub 120 to support the wheel 116 and the tire 118 for rotation with respect to the knuckle. The knuckle 122 is also connected to non-rotating components of the brake system 112, while rotating components of the brake system 112 are connected to the wheel hub 120 and/or the wheel 116.

The upper control arm 124 and the lower control arm 126 connect the knuckle 122 to the vehicle body structure 102 such that the knuckle 122 is movable with respect to the vehicle body structure 102, primarily in a generally vertical direction. As an example, the upper control arm 124 and the lower control arm 126 may each be connected to the vehicle body structure 102 and to the knuckle 122 by pivot joints that allow rotation in one or more rotational degrees of freedom. The suspension damper 128 is a suspension component that is configured to regulate motion of the wheel assembly 104 with respect to the vehicle body structure 102. The suspension damper 128 may be, as examples, a shock, a strut, a spring, a linear actuator, or other active suspension component or passive suspension component.

The propulsion system 108 includes propulsion components that are configured to cause motion of the vehicle 100 (e.g., accelerating the vehicle 100), by generating and transmitting torque to the wheel assembly 104 (and other wheels of the vehicle 100). In the illustrated example, the propulsion system 108 includes a motor 130 and a drive shaft 132 that connects the motor 130 to the wheel assembly 104. The motor 130 may be, as examples, an internal combustion engine powered by a combustible fuel or one or more electric motors that are powered by electricity (e.g., from a battery). Electric motors that are included in the propulsion system 108 may further be configured to operate as generators that charge the battery in a regenerative braking configuration.

The steering system 110 is operable to cause the vehicle to turn by changing a steering angle of the wheel assembly 104 (and other wheels of the vehicle 100). In the illustrated implementation, the steering system 110 includes a steering actuator 134 and a steering linkage 136 that is connected to the knuckle 122.

The brake system 112 provides deceleration torque for decelerating the vehicle 100 using friction braking components, as will be described further herein.

The mass damper system 114 is a passive suspension component that is a part of the suspension system 106 and is configured to damp vibration of the wheel assembly 104. The mass damper system 114 damps vibration of the wheel assembly 104 by regulating movement of a damper mass. As will be explained herein, the damper mass includes components from the brake system 112. By damping vibration of the wheel assembly 104, the mass damper system 114 is able to reduce transmission of vibration from the unsprung mass of the vehicle 100 to the sprung mass of the vehicle 100, and is also able to reduce the occurrence of wheel hop. By incorporating parts of the brake system 112 in the damper mass, the mass damper system 114 reduces the amount of added mass that is needed to damp vibrations of the wheel assembly 104.

FIG. 2 is a schematic rear view cross-section illustration that shows the wheel assembly 104, the brake system 112 and the mass damper system 114. The knuckle 122 serves as a support structure for the wheel assembly 104, the brake system 112, and the mass damper system. In the illustrated implementation, the wheel hub 120 is connected to the knuckle 122. The wheel hub 120 is a connecting structure that supports the wheel assembly 104 so that the wheel assembly 104 is able to rotate with respect to the knuckle 122 or other support structure of the suspension system 106 that connects the wheel assembly 104 to the sprung mass of the vehicle 100. In the illustrated implementation, the wheel 116 and the tire 118 are connected to the knuckle 122 by the wheel hub 120 so that the wheel 116 and the tire 118 are able to rotate with respect to the knuckle 122 on a rotation axis 238. At least part of the wheel hub 120 may extend along the rotation axis 238 and include or define a rotational joint (e.g., including bearings) that allows rotation with respect to the 122.

The brake system 112 includes a brake rotor 240, a caliper assembly 242, and an actuator 244. The brake rotor 240 is connected to the wheel 116 for rotation with the wheel 116 (e.g., the brake rotor 240 rotates in unison with the wheel 116). The caliper assembly 242 is connected to the knuckle 122 so that the caliper assembly 242 is able to move according to (e.g., generally parallel to) a line of action 246. In some implementations, the line of action 246 extends radially with respect to the rotation axis 238. In some implementations, the line of action 246 is generally vertical (e.g., within fifteen degrees of vertical).

The mass damper system 114 includes a damper mass and a damper assembly 248. The damper mass is the part of the mass damper system 114 that moves in order to counteract unwanted vibrations of the wheel assembly 104. Portions of the brake system 112 are included in the damper mass. In the illustrated implementation, the caliper assembly 242 is part of the damper mass.

The damper assembly 248 is configured to regulate motion of the damper mass so that movement of the damper mass counters the unwanted vibrations of the wheel assembly 104. The damper assembly 248 is connected to a support structure, which is this implementation is the knuckle 122. The damper assembly is also connected to the damper mass, which in this implementation includes the caliper assembly 242 and may optionally include other structures.

Thus, in the illustrated implementation, the damper assembly 248 is connected to the knuckle 122 and is connected to the caliper assembly 242 to regulate movement of the caliper assembly 242 with respect to the knuckle 122 along the line of action line of action 246, wherein the caliper assembly 242 (being part of or all of the damper mass) and the damper assembly 248 cooperate to define the mass damper system 114, which damps vibration of the wheel 116 and other portions of the wheel assembly 104.

In the illustrated implementation, the damper assembly 248 includes a damper 250 and a spring 252. The spring 252 biases the caliper assembly 242 toward a neutral position. The neutral position is a position that the caliper assembly 242 is disposed in the absence of external forces that cause movement of the caliper assembly 242 with respect to the knuckle 122. The damper 250 resists movement of the caliper assembly 242 with respect to the knuckle 122. As an example, the damper assembly 248 may be configured so that the caliper assembly 242 is able to travel along the line of action 246 within a range of at least ten millimeters above the neutral position to at least ten millimeters below the neutral position.

The caliper assembly 242 and/or other portions of the damper mass may be connected a support structure (e.g., the knuckle 122) by structures other than the damper mass in order to regulate motion of the damper mass. As an example, the caliper assembly 242 may be connected to the knuckle 122 by a linear bearing 254. The linear bearing 254 is a mechanical component that may be implemented according to conventional designs, and functions to restrain motion other than linear translation. In the illustrated implementation, the caliper assembly 242 is connected to the knuckle 122 by the linear bearing 254 so that the linear bearing 254 restrains movement of the caliper assembly 242 according to the line of action 246, meaning that the linear bearing 254 resists movement other than movement along the line of action 246. It is noted that at least part of the caliper assembly 242 is fixed to the linear bearing 254, but portions of the caliper assembly 242 may move relative to each other in directions other than along the line of action 246.

FIG. 3 is a schematic side view illustration that shows a brake system 312 and a mass damper system 314 according to a first example implementation. FIG. 4 is a schematic top view cross-section illustration that shows the brake system 312 and the mass damper system 314 according to the first example implementation. The brake system 312 and the mass damper system 314 may be incorporated in the vehicle 100 in place of the brake system 112 and the mass damper system 114. The description of the brake system 112 and the mass damper system 114 is applicable to the brake system 312 and the mass damper system 314 except as described to the contrary herein.

The brake system 312 includes a brake rotor 340 and a caliper assembly 342. The brake rotor 340 is supported by a wheel hub 320 so that it rotates with a tire of the vehicle, as described with respect to the brake rotor 240, the wheel hub 120, and the tire 118 of the vehicle 100. The brake rotor 340 is formed from a material that has a high thermal conductivity and serves as the primary heat sink of the brake system 312. The caliper assembly 342 includes an actuator 344, a caliper housing 356, and brake pads 358. The caliper assembly 342 is supported by a support structure such as a knuckle 322 so that it does not rotate with the brake rotor 340. The caliper housing 356 is a structure that supports the actuator 344 and the brake pads 358. The actuator 344 (e.g., a hydraulic actuator or an electromechanical actuator) is operable to move the brake pads 358 into engagement with the brake rotor 340. The brake pads 358 include surfaces that are formed from a brake friction material and are engageable with the brake rotor 340 by contacting the brake rotor 340 when the brake pads 358 are moved into engagement with the brake rotor 340 by the actuator 344.

The mass damper system 314 includes a damper assembly 348 and a damper mass. The caliper assembly 342 is included in the damper mass. Other structures may be included in the damper mass. The damper assembly 348 regulates motion of the damper mass in order to damp vibrations of a wheel assembly, and may be configured in and operate in the manner described with respect to the damper assembly 248.

FIG. 5 is a schematic side view illustration that shows the brake system 112 and the mass damper system 114 according to a second example implementation. FIG. 6 is a schematic top view illustration that shows the brake system 112 and the mass damper system 114 according to the second example implementation. The brake system 512 and the mass damper system 514 may be incorporated in the vehicle 100 in place of the brake system 112 and the mass damper system 114. The description of the brake system 112 and the mass damper system 114 is applicable to the brake system 512 and the mass damper system 514 except as described to the contrary herein.

The brake system 512 includes a brake rotor 540 that is supported by a wheel hub 520, a first caliper assembly 542 a and a second caliper assembly 542 b. The brake system 512 may be implemented in accordance with the description of the brake system 312 and may operate in the same manner. The first caliper assembly 542 a and the second caliper assembly 542 b may be implemented in the manner described with respect to the caliper assembly 342 and operate in the same manner. The first caliper assembly 542 a and the second caliper assembly 542 b are located at opposite sides of the brake rotor 540 (e.g., spaced by 180 degrees radially with respect to the brake rotor 540) and may be interconnected so that reaction forces during braking do not cause motion of the damper mass.

The mass damper system 314 includes a first damper assembly 548 a that is connected to the first caliper assembly 542 a, a second damper assembly 548 b that is connected to the second caliper assembly 542 b and a damper mass that includes the first caliper assembly 542 a, the second caliper assembly 542 b, and optionally includes other structures. The first damper assembly 548 a and the second damper assembly 548 b connect the first caliper assembly 542 a and the second caliper assembly 542 b to a support structure such as a knuckle 522. The first caliper assembly 542 a and the second caliper assembly 542 b may also be connected to the knuckle 522 by other structures such as linear bearings as previously described. The first damper assembly 548 a and the second damper assembly 548 b regulate motion of the damper mass to damp vibrations of the wheel assembly in the manner described with respect to the damper assembly 348 of the 314.

FIG. 7 is a schematic side view illustration that shows a brake system 712 and a mass damper system 714 according to a third example implementation. FIG. 8 is a schematic top view cross-section illustration that shows the brake system 712 and the mass damper system 714 according to the third example implementation. The brake system 712 and the mass damper system 714 may be incorporated in the vehicle 100 in place of the brake system 112 and the mass damper system 114. The description of the brake system 112 and the mass damper system 114 is applicable to the brake system 712 and the mass damper system 714 except as described to the contrary herein.

The brake system 712 includes a brake rotor 740 and a caliper assembly 742. The brake rotor 740 is supported by a wheel hub 720 so that it rotates with a tire of the vehicle, as described with respect to the brake rotor 240, the wheel hub 120, and the tire 118 of the vehicle 100. The brake rotor 740 includes a support disk 760, a first friction pad portion 762, and a second friction pad portion 764.

The support disk 760 is an annular structure that is connected to the wheel hub 720 so that the support disk 760 rotates with the wheel of the vehicle and therefore rotates with respect to the caliper assembly 742, which does not rotate with the wheel of the vehicle. As an example, the support disk 760 may have a central opening 761 and a portion of the wheel hub 720 or a component associated with the wheel hub 720 may pass through the central opening 761 and engage the support disk 760 adjacent to the central opening 761. The support disk 760 and may be movable axially over a limited range with respect to the wheel hub 720 (e.g., by a splined connection of the support disk 760 to the wheel hub 720).

The support disk 760 functions to provide structural support for the first friction pad portion 762 and the second friction pad portion 764. The support disk 760 is formed from a substantially rigid material. As an example, the support disk 760 may be formed from metal.

The first friction pad portion 762 and the second friction pad portion 764 are each annular structures that are connected to and supported by the support disk 760. The first friction pad portion 762 includes a first brake rotor surface that engages the caliper assembly 742 during braking. The second friction pad portion 764 includes a second brake rotor surface that engages the caliper assembly 742 during braking.

The first friction pad portion 762 and the second friction pad portion 764 are each formed from a brake friction material. As an example, the brake friction material may include an organic material and a binder. As an example, the brake friction material may be a non-asbestos organic brake friction material. As an example, the brake friction material may be a semi-metallic brake friction material. As an example, the brake friction material may be a ceramic brake friction material. As an example, the brake friction material may be a sintered metal brake friction material.

The caliper assembly 742 includes actuators 744, a caliper frame 756, an inner caliper plate 766, and an outer caliper plate 768. The caliper assembly 742 is supported by a support structure such as a knuckle 722 so that it does not rotate with the brake rotor 740.

The caliper frame 756 is a structure that supports the actuators 744, the inner caliper plate 766, and the outer caliper plate 768. The caliper frame 756 is connected to the inner caliper plate 766, and to the outer caliper plate 768, such as by bolts located at an outer periphery of the caliper assembly 742 in the illustrated implementation.

In the illustrated implementation, the caliper frame 756 of the caliper assembly 742 is connected to the knuckle 722 by the mass damper system 714. The caliper frame 756 of the caliper assembly 742 is also connected to the knuckle 722 by a first linear bearing 754 a and a second linear bearing 754 b that allow motion of the caliper assembly 742 along a line of action 746, but restrain the caliper assembly 742 from moving with respect to the knuckle 722 other than according to the line of action 746. In some implementations, the line of action 746 extends radially with respect to a rotation axis 738 of the wheel hub 720. In some implementations, the line of action 746 is generally vertical (e.g., within fifteen degrees of vertical).

The inner caliper plate 766 is located on a first side of the brake rotor 740, which in this implementation is the inboard side of the brake rotor 740, which is located toward the body structure of the vehicle relative to the brake rotor 740. The inner caliper plate 766 is a disk-like structure, but need not have a circular outer periphery, as outer structures (e.g., oval) may be more suitable given that the inner caliper plate 766 (along with the remainder of the caliper assembly 742) translates up and down within the internal space of the wheel. The inner caliper plate 766 has a central opening 767, and the wheel hub 720 extends through the central opening 767. The central opening 767 provides clearance relative to the wheel hub 720 to allow translation of the inner caliper plate 766 with respect to the wheel hub 720. For example, the central opening 767 may be elongate in the direction of the line of action 746. The inner caliper plate 766, including the caliper surface thereof that is engageable with the brake rotor 740 during braking, extends around the central opening 767 in a ring-like configuration so that the caliper surface encircles the central opening 767.

The inner caliper plate 766 includes a flexible connector structure 770 by which the inner caliper plate 766 is connected to the caliper frame 756 and the outer caliper plate 768 at an outer periphery of the caliper assembly 742. The flexible connector structure 770 functions to allow axial travel of the inner caliper plate 766 when the actuators 744 engage the outer caliper plate 768 during braking. The configuration of the flexible connector structure 770 may be similar that of a clutch pressure plate.

The outer caliper plate 768 is located on a second side of the brake rotor 740, which in this implementation is the outboard side of the brake rotor 740, which is located away from the body structure of the vehicle relative to the brake rotor 740. The outer caliper plate 768 is a disk-like structure, but need not have a circular outer periphery, as outer structures (e.g., oval) may be more suitable given that the outer caliper plate 768 (along with the remainder of the caliper assembly 742) translates up and down within the internal space of the wheel. The outer caliper plate 768 has a central opening 769, and the wheel hub 720 extends through the central opening 769. The central opening 769 provides clearance relative to the wheel hub 720 to allow translation of the outer caliper plate 768 with respect to the wheel hub 720. For example, the central opening 769 may be elongate in the direction of the line of action 746. The outer caliper plate 768, including the caliper surface thereof that is engageable with the brake rotor 740 during braking, extends around the central opening 769 in a ring-like configuration so that the caliper surface encircles the central opening 769.

The configuration of and materials chosen for the inner caliper plate 766 and the inner caliper plate 766 are similar to the configuration and materials of conventional brake rotors. As a result, the caliper assembly 742 has a greater mass than the brake rotor 740 and the caliper assembly 742 has a greater thermal mass than the brake rotor 740. This concentrates the mass of the brake system 712 in the components that are used as the damper mass of the mass damper system 714. As an example, at least part of the inner caliper plate 766 and at least part of the outer caliper plate 768 may be formed from a ferrous material. The ferrous material of the inner caliper plate 766 and the outer caliper plate 768 may be, for example, an iron-based metal or an iron-based metal alloy, or a metal-matrix composite.

The material used for the inner caliper plate 766 and the outer caliper plate 768 has a much higher thermal conductivity than the thermal conductivity of the brake friction material of the brake rotor 740. The inner caliper plate 766 and the outer caliper plate 768 therefore have a much higher thermal capacity than the brake rotor 740, allowing the inner caliper plate 766 and the outer caliper plate 768 to serve as heat sinks and thereby reduce the heat absorbed by the brake rotor 740. As one example, the inner caliper plate 766 may include a first caliper surface that is engageable with the brake rotor 740, the outer caliper plate 768 may include a second caliper surface that is engageable with the brake rotor 740, and the first caliper surface and the second caliper surface may be formed from a ferrous material. As another example, the inner caliper plate 766 may include a first caliper surface that is engageable with the brake rotor 740, the outer caliper plate 768 may include a second caliper surface that is engageable with the brake rotor 740, and the first caliper surface and the second caliper surface may be formed from a metal-matrix composite. As another example, the inner caliper plate 766 may include a first caliper surface that is engageable with the brake rotor 740, the outer caliper plate 768 may include a second caliper surface that is engageable with the brake rotor 740, and the first caliper surface and the second caliper surface may be formed from a material having a higher thermal conductivity that the thermal conductivity of the brake rotor 740.

The actuators 744 (e.g., hydraulic actuators or electromechanical actuators) are operable to apply pressure to the inner caliper plate 766 which moves the inner caliper plate 766 into engagement with the brake rotor 740 and clamps the brake rotor 740 between the inner caliper plate 766 and the outer caliper plate 768 to apply braking.

The mass damper system 714 includes a first damper assembly 748 a, a second damper assembly 748 b and a damper mass. The caliper assembly 742 is included in the damper mass. Other structures may be included in the damper mass. The first damper assembly 748 a and the second damper assembly 748 b regulate motion of the damper mass in order to damp vibrations of a wheel assembly, and may be configured in and operate in the manner described with respect to the damper assembly 248. As an example, each of the first damper assembly 748 a and the second damper assembly 748 b may include a spring and a damper (e.g., a fluid damper), as previously described. In the illustrated example the first damper assembly 748 a and the second damper assembly 748 b are located on opposite sides of the wheel hub 720 in the front to rear direction of the vehicle.

FIG. 9 is a schematic side view illustration that shows a brake system 912 and a mass damper system 914 according to a fourth example implementation. FIG. 10 is a schematic top view cross-section illustration that shows the brake system 912 and the mass damper system 914 according to the fourth example implementation. The brake system 912 and the mass damper system 914 may be incorporated in the vehicle 100 in place of the brake system 112 and the mass damper system 114. The description of the brake system 112 and the mass damper system 114 is applicable to the brake system 912 and the mass damper system 914 except as described to the contrary herein.

The brake system 912 includes a brake rotor 940 and a caliper assembly 942. The brake rotor 940 is supported by a wheel hub 920 so that it rotates with a tire of the vehicle, as described with respect to the brake rotor 240, the wheel hub 120, and the tire 118 of the vehicle 100. The brake rotor 940 includes a support disk 960, a first friction pad portion 962, and a second friction pad portion 964.

The support disk 960 is an annular structure that is connected to the wheel hub 920 so that the support disk 960 rotates with the wheel of the vehicle and therefore rotates with respect to the caliper assembly 942, which does not rotate with the wheel of the vehicle. As an example, the support disk 960 may have a central opening 961 and a portion of the wheel hub 920 or a component associated with the wheel hub 920 may pass through the central opening 961 and engage the support disk 960 adjacent to the central opening 961. The support disk 960 and may be movable axially over a limited range with respect to the wheel hub 920 (e.g., by a splined connection of the support disk 960 to the wheel hub 920).

The support disk 960 functions to provide structural support for the first friction pad portion 962 and the second friction pad portion 964. The support disk 960 is formed from a substantially rigid material. As an example, the support disk 960 may be formed from metal.

The first friction pad portion 962 and the second friction pad portion 964 are each annular structures that are connected to and supported by the support disk 960. The first friction pad portion 962 includes a first brake rotor surface that engages the caliper assembly 942 during braking. The second friction pad portion 964 includes a second brake rotor surface that engages the caliper assembly 942 during braking.

The first friction pad portion 962 and the second friction pad portion 964 are each formed from a brake friction material. As an example, the brake friction material may include an organic material and a binder. As an example, the brake friction material may be a non-asbestos organic brake friction material. As an example, the brake friction material may be a semi-metallic brake friction material. As an example, the brake friction material may be a ceramic brake friction material. As an example, the brake friction material may be a sintered metal brake friction material.

The caliper assembly 942 includes a actuators 944, an inner caliper plate 966, an outer caliper plate 968, and connector parts 972 that interconnect the inner caliper plate 966 and the outer caliper plate 968. The caliper assembly 942 is supported by a support structure such as a knuckle 922 so that it does not rotate with the brake rotor 940. The actuators 944, the outer caliper plate 968, and the connector parts 972 are supported by the inner caliper plate 966.

The inner caliper plate 966 is located on a first side of the brake rotor 940, which in this implementation is the inboard side of the brake rotor 940, which is located toward the body structure of the vehicle relative to the brake rotor 940. The inner caliper plate 966 of the caliper assembly 942 is located between the brake rotor 940 and the knuckle 922.

The inner caliper plate 966 is a disk-like structure, but need not have a circular outer periphery, as outer structures (e.g., oval) may be more suitable given that the inner caliper plate 966 (along with the remainder of the caliper assembly 942) translates up and down within the internal space of the wheel. The inner caliper plate 966 has a central opening 967, and the wheel hub 920 extends through the central opening 967. The central opening 967 provides clearance relative to the wheel hub 920 to allow translation of the inner caliper plate 966 with respect to the wheel hub 920. The inner caliper plate 966, including the caliper surface thereof that is engageable with the brake rotor 940 during braking, extends around the central opening 967 in a ring-like configuration so that the caliper surface encircles the central opening 967.

The inner caliper plate 966 is connected to the knuckle 922 by a first linear bearing 954 a and by a second linear bearing 954 b. The first linear bearing 954 a and the second linear bearing 954 b allow motion of the caliper assembly 942 along a line of action 946, but restrain the caliper assembly 942 from moving with respect to the knuckle 922 other than according to the line of action 946 (with the exception of relative motion of portions of the caliper assembly 942 for braking). In some implementations, the line of action 946 extends radially with respect to a rotation axis 938 of the wheel hub 920. In some implementations, the line of action 946 is generally vertical (e.g., within fifteen degrees of vertical). Connection of the inner caliper plate 966 to the knuckle 922 by the first linear bearing 954 a and the second linear bearing 954 b restrains the inner caliper plate 966 from moving in the direction of the rotation axis 938 of the wheel hub 920.

In the illustrated implementation, the first linear bearing 954 a and the second linear bearing 954 b are aligned vertically. The first linear bearing 954 a is located directly above the rotation axis of the wheel hub 920. The second linear bearing 954 b is located directly below the rotation axis of the wheel hub 920. The first linear bearing 954 a includes a first bearing part 974 a and a second bearing part 975 a that are linearly slidable with respect to each other. The first bearing part 974 a is connected to the inner caliper plate 966 and the second bearing part 975 a is connected to the knuckle 922. The second linear bearing 954 b includes a first bearing part 974 b and a second bearing part 975 b that are linearly slidable with respect to each other. The first bearing part 974 b is connected to the inner caliper plate 966 and the second bearing part 975 b is connected to the knuckle 922.

The inner caliper plate 966 is connected to the knuckle 922 by the mass damper system 914. The mass damper system 914 is a passive suspension component that is configured to damp vibration of a wheel assembly that the mass damper system 914 is incorporated in, such as the wheel assembly 104. The mass damper system 914 damps vibration of the wheel assembly by regulating movement of a damper mass, which in this implementation includes the caliper assembly 942 of the brake system 912 and may also include other components. To connect the inner caliper plate 966 to the mass damper assembly, the inner caliper plate 966 includes a first upper damper mount 976 a, a first lower damper mount 977 a, a second upper damper mount 976 b, and a second lower damper mount 977 b.

The outer caliper plate 968 is located on a second side of the brake rotor 940, which in this implementation is the outboard side of the brake rotor 940, which is located away from the body structure of the vehicle relative to the brake rotor 940. The outer caliper plate 968 is a disk-like structure, but need not have a circular outer periphery, as outer structures (e.g., oval) may be more suitable given that the outer caliper plate 968 (along with the remainder of the caliper assembly 942) translates up and down within the internal space of the wheel. The outer caliper plate 968 has a central opening 969, and the wheel hub 920 extends through the central opening 969. The central opening 969 provides clearance relative to the wheel hub 920 to allow translation of the outer caliper plate 968 with respect to the wheel hub 920. The outer caliper plate 968, including the caliper surface thereof that is engageable with the brake rotor 940 during braking, extends around the central opening 969 in a ring-like configuration so that the caliper surface encircles the central opening 969.

The connector parts 972 define a sliding connection of the outer caliper plate 968 with respect to the inner caliper plate 966 and allow the actuators 944 to move the outer caliper plate 968 toward the inner caliper plate 966 to clamp the brake rotor 940 between the inner caliper plate 966 and the outer caliper plate 968 to applying braking forces. In the illustrated implementation, the connector parts 972 are L-shaped structures that include axially extending portions 978 and transversely extending portions 979. The axially extending portions 978 are located near an outer periphery of the caliper assembly 942 and are rigidly connected to the outer caliper plate 968, such as by bolts located at an outer periphery of the outer caliper plate 968 in the illustrated implementation. The axially extending portions 978 extend in the inboard direction from the outer caliper plate 968 past the inner caliper plate 966, where the transversely extending portions 979 are located inboard from the inner caliper plate 966 and extend radially inward toward the wheel hub 920.

To mount the outer caliper plate 968 and the connector parts 972 with respect to the inner caliper plate 966, the connector parts 972 may be slidably mounted to the inner caliper plate 966 by pins 980 that are located at the transversely extending portions 979 of the connector parts 972. This allows the outer caliper plate 968 to slide parallel to the rotation axis of the wheel hub 920. In the illustrated example, the pins 980 are fixed to the connector parts 972 and extend into holes in the inner caliper plate 966. The pins 980 may instead be fixed to the inner caliper plate 966 and extend into holds in the connector parts 972.

The actuators 944 (e.g., a hydraulic actuators or electromechanical actuators) are connected to the inner caliper plate 966 and are positioned between the inner caliper plate 966 and the transversely extending portions 979 of the connector parts 972. The actuators 944 may be actuated to apply force in the inboard direction, which engages the transversely extending portions 979 of the connector parts 972 and consequently causes the outer caliper plate 968 to move in the inboard direction to apply braking forces by clamping of the brake rotor 940 between the inner caliper plate 966 and the outer caliper plate 968.

The configuration of and materials chosen for the inner caliper plate 966 and the inner caliper plate 966 are similar to the configuration and materials of conventional brake rotors. As a result, the caliper assembly 942 has a greater mass than the brake rotor 940 and the caliper assembly 942 has a greater thermal mass than the brake rotor 940. This concentrates the mass of the brake system 912 in the components that are used as the damper mass of the mass damper system 914. As an example, at least part of the inner caliper plate 966 and at least part of the outer caliper plate 968 may be formed from a ferrous material. As an example, the inner caliper plate 966 may include a first caliper surface that is engageable with the brake rotor 940, the outer caliper plate 968 may include a second caliper surface that is engageable with the brake rotor 940, and the first caliper surface and the second caliper surface may be formed from a ferrous material. The ferrous material of the inner caliper plate 966 and the outer caliper plate 968 may be, for example, an iron-based metal or metal alloy. The ferrous material has a much higher thermal conductivity than the thermal conductivity of the brake friction material of the brake rotor 940. The inner caliper plate 966 and the outer caliper plate 968 therefore have a much higher thermal capacity than the brake rotor 940, allowing the inner caliper plate 966 and the outer caliper plate 968 to serve as heat sinks and thereby reduce the heat absorbed by the brake rotor 940.

The mass damper system 914 includes a first damper assembly 948 a, a second damper assembly 948 b and a damper mass. The caliper assembly 942 is included in the damper mass. Other structures may be included in the damper mass.

The first damper assembly 948 a and the second damper assembly 948 b regulate motion of the damper mass in order to damp vibrations of a wheel assembly, and may be configured in and operate in the manner described with respect to the damper assembly 248. As an example, each of the first damper assembly 948 a and the second damper assembly 948 b may include a spring and a damper (e.g., a fluid damper), as previously described. In the illustrated example the first damper assembly 948 a and the second damper assembly 948 b are located on opposite sides of the wheel hub 920 in the front to rear direction of the vehicle.

In the illustrated example, the first damper assembly 948 a is connected to a first knuckle portion 982 a of the knuckle 922 and the second damper assembly 948 b is connected to a second knuckle portion 982 b of the knuckle 922. These connections may be at a vertical midpoint of each of the first damper assembly 948 a and the second damper assembly 948 b, substantially equidistant from the first upper damper mount 976 a and the second upper damper mount 976 b relative to the first lower damper mount 977 a and the second lower damper mount 977 b in the neutral position.

The first damper assembly 948 a and the second damper assembly 948 b include upper springs 984 a, a lower springs 984 b, and dampers 985. The upper springs 984 a each extend from a respect one of the first knuckle portion 982 a or the second knuckle portion 982 b to the first upper damper mount 976 a or the second upper damper mount 976 b. The lower springs 984 b each extend from a respect one of the first knuckle portion 982 a or the second knuckle portion 982 b to the first lower damper mount 977 a or the second lower damper mount 977 b. This urges the caliper assembly 942 to the neutral position. The first knuckle portion 982 a and the second knuckle portion 982 b are each connected to one of the dampers 985, for example, in a sliding, collar-like configuration. The dampers are configured to resist translation of the caliper assembly 942 with respect to the knuckle 922 along the action 946, and may be fluid dampers as previously described. In the illustrated implementation, the dampers 985 each have a cylinder that is connected to the first knuckle portion 982 a or the second knuckle portion 982 b and a double-ended piston rod that extends between the first upper damper mount 976 a or the second upper damper mount 976 b and the first lower damper mount 977 a or the second lower damper mount 977 b.

FIG. 11 is a schematic top view cross-section illustration that shows a brake caliper assembly 1142 and a rotor 1140 having tapered engagement surfaces. The brake caliper assembly 1142 and the rotor 1140 may be included in the braking systems described herein to cause the mass damper systems to move to the neutral position during braking. The rotor 1140 is arranged for rotation on a rotation axis 1138 as previously described in the context of other examples. The brake caliper assembly 1142 includes an inner caliper plate 1166 and an outer caliper plate 1168. The inner caliper plate 1166 has a first caliper surface that is engageable with a first rotor surface of the rotor 1140 during braking, and the outer caliper plate 1168 has a second caliper surface that is engageable with a second rotor surface of the rotor 1140 during braking. The first caliper surface, the second caliper surface, the first rotor surface, and the second rotor surface are all tapered, such that they are not flat with respect to a plane constructed perpendicular to the rotation axis 1138, but instead, rise or fall (e.g., linearly) along a line extending in the radial direction when compared to a plane constructed perpendicular to the rotation axis 1138. Thus, for example, the first caliper surface, the second caliper surface, the first rotor surface, and the second rotor surface may all define frustroconical shapes. The first rotor surface is engageable with and complementary to the first caliper surface, and the second rotor surface is engageable with and complementary to the second caliper surface. When engaged, the complementary tapered profiles cause the inner caliper plate 1166 and the outer caliper plate 1168 to shift by engagement with the rotor 1140 according to a cam-like action to center them with respect to the rotor 1140, thereby placing the inner caliper plate 1166 and the outer caliper plate 1168 in the neutral position during braking.

FIG. 12 is a block diagram that shows a mass damper control system 1286 according to an example. The mass damper control system 1286 includes a damper locking mechanism 1288 and a controller 1290. The mass damper control system 1286 can be used in conjunction with the mass damper systems described herein to stop movement of the damper mass under certain conditions. The damper locking mechanism 1288 is operable to prevent translation of the damper mass along its line of action. As one example, the damper locking mechanism 1288 may be implemented in the form of an electromechanical lock that is incorporated in linear bearings that support the damper mass to arrest motion of the damper mass. As another example, the damper locking mechanism 1288 may be implemented in the form of a hydraulic circuit in a fluid damper that is selectively closable to restrain motion of the fluid damper. The controller 1290 is configured to determine whether to stop movement of the damper mass. The controller 1290 may be configured to determine whether to stop movement of the damper mass by evaluating one or more conditions. As an example, the controller 1290 may be configured to stop movement of the damper mass upon determining that a speed of the vehicle has gone below a threshold speed value.

FIG. 13 is a block diagram that shows an example of the controller 1290. The controller 1290 may be used to control a mass damper assembly, as previously described, and may also be used to control other systems, such as a braking system or an active suspension system. The controller 1290 may include a processor 1391, a memory 1392, a storage device 1393, one or more input devices 1394, and one or more output devices 1395. The controller 1290 may include a bus or a similar device to interconnect the components for communication. The processor 1391 is operable to execute computer program instructions and perform operations described by the computer program instructions. As an example, the processor 1391 may be a conventional device such as a central processing unit. The memory 1392 may be a volatile, high-speed, short-term information storage device such as a random-access memory module. The storage device 1393 may be a non-volatile information storage device such as a hard drive or a solid-state drive. The input devices 1394 may include any type of human-machine interface such as buttons, switches, a keyboard, a mouse, a touchscreen input device, a gestural input device, or an audio input device. The output devices 1395 may include any type of device operable to provide an indication to a user regarding an operating state, such as a display screen or an audio output, or any other functional output or control.

As used in the claims, phrases in the form of “at least one of A, B, or C” should be interpreted to encompass only A, or only B, or only C, or any combination of A, B and C.

As described above, one aspect of the present technology is suspension control, which may, in some implementations, include the gathering and use of data available from various sources to customize operation based on user preferences. The present disclosure contemplates that in some instances, this gathered data may include personal information data that uniquely identifies or can be used to contact or locate a specific person. Such personal information data can include demographic data, location-based data, telephone numbers, email addresses, twitter ID's, home addresses, data or records relating to a user's health or level of fitness (e.g., vital signs measurements, medication information, exercise information), date of birth, or any other identifying or personal information. As one example, information describing a user of the vehicle may be collected and used to adjust the ride of the vehicle based on user preferences. As another example, the vehicle may include sensors that are used to control operation of the vehicle, and these sensors may obtain information (e.g., still pictures or video images) that can be used to identify persons present in the image.

The present disclosure recognizes that the use of such personal information data, in the present technology, can be used to the benefit of users. For example, the personal information data can be used to develop a user profile that describes user comfort levels for certain types of motion of the vehicle.

The present disclosure contemplates that the entities responsible for the collection, analysis, disclosure, transfer, storage, or other use of such personal information data will comply with well-established privacy policies and/or privacy practices. In particular, such entities should implement and consistently use privacy policies and practices that are generally recognized as meeting or exceeding industry or governmental requirements for maintaining personal information data private and secure. Such policies should be easily accessible by users and should be updated as the collection and/or use of data changes. Personal information from users should be collected for legitimate and reasonable uses of the entity and not shared or sold outside of those legitimate uses. Further, such collection/sharing should occur after receiving the informed consent of the users. Additionally, such entities should consider taking any needed steps for safeguarding and securing access to such personal information data and ensuring that others with access to the personal information data adhere to their privacy policies and procedures. Further, such entities can subject themselves to evaluation by third parties to certify their adherence to widely accepted privacy policies and practices. In addition, policies and practices should be adapted for the particular types of personal information data being collected and/or accessed and adapted to applicable laws and standards, including jurisdiction-specific considerations. For instance, in the US, collection of or access to certain health data may be governed by federal and/or state laws, such as the Health Insurance Portability and Accountability Act (HIPAA); whereas health data in other countries may be subject to other regulations and policies and should be handled accordingly. Hence different privacy practices should be maintained for different personal data types in each country.

Despite the foregoing, the present disclosure also contemplates embodiments in which users selectively block the use of, or access to, personal information data. That is, the present disclosure contemplates that hardware and/or software elements can be provided to prevent or block access to such personal information data. For example, in the identifying content to be displayed to users, the present technology can be configured to allow users to select to “opt in” or “opt out” of participation in the collection of personal information data during registration for services or anytime thereafter. In another example, users can select not to provide personal data for use in suspension control. In yet another example, users can select to limit the length of time personal data is maintained or entirely prohibit the use and storage of personal data. In addition to providing “opt in” and “opt out” options, the present disclosure contemplates providing notifications relating to the access or use of personal information. For instance, a user may be notified upon downloading an app that their personal information data will be accessed and then reminded again just before personal information data is accessed by the app.

Moreover, it is the intent of the present disclosure that personal information data should be managed and handled in a way to minimize risks of unintentional or unauthorized access or use. Risk can be minimized by limiting the collection of data and deleting data once it is no longer needed. In addition, and when applicable, including in certain health related applications, data de-identification can be used to protect a user's privacy. De-identification may be facilitated, when appropriate, by removing specific identifiers (e.g., date of birth, etc.), controlling the amount or specificity of data stored (e.g., collecting location data a city level rather than at an address level), controlling how data is stored (e.g., aggregating data across users), and/or other methods.

Therefore, although the present disclosure broadly covers use of personal information data to implement one or more various disclosed embodiments, the present disclosure also contemplates that the various embodiments can also be implemented without the need for accessing such personal information data. That is, the various embodiments of the present technology are not rendered inoperable due to the lack of all or a portion of such personal information data. For example, suspension control can be performed using non-personal information data or a bare minimum amount of personal information, other non-personal information available to the devices, or publicly available information. 

What is claimed is:
 1. An apparatus, comprising: a knuckle; a wheel that is connected to the knuckle so that it is able to rotate with respect to the knuckle on a rotation axis; a brake rotor that is connected to the wheel for rotation with the wheel; a caliper assembly that is connected to the knuckle so that the caliper assembly is able to linearly translate according to a line of action that extends radially with respect to the rotation axis; and a damper assembly that is connected to the knuckle and is connected to the caliper assembly to regulate movement of the caliper assembly with respect to the knuckle along the line of action, wherein the caliper assembly and the damper assembly cooperate to define a mass damper system that damps vibration of the wheel.
 2. The apparatus of claim 1, wherein the damper assembly includes a damper and a spring.
 3. The apparatus of claim 2, wherein the spring biases the caliper assembly toward a neutral position and the damper resists movement of the caliper assembly with respect to the knuckle.
 4. The apparatus of claim 1, wherein the caliper assembly is connected to the knuckle by a linear bearing that restrains movement of the caliper assembly according to the line of action.
 5. The apparatus of claim 1, wherein the line of action is generally vertical.
 6. The apparatus of claim 1, wherein: the caliper assembly includes an outer caliper plate, an inner caliper plate, and an actuator that is configured to move the inner caliper plate and the outer caliper plate into engagement with a first rotor surface and a second rotor surface of the brake rotor, and the first rotor surface and the second rotor surface of the brake rotor are formed from a brake friction material.
 7. An apparatus, comprising: a knuckle; a wheel that is connected to the knuckle so that it is able to rotate with respect to the knuckle on a rotation axis; a brake rotor that is connected to the wheel for rotation with the wheel; a caliper assembly that is connected to the knuckle so that the caliper assembly is able to translate with respect to the knuckle, the wheel, and the brake rotor, wherein the caliper assembly includes a first caliper part that is located on an inboard side of the brake rotor, a second caliper part that is located on an outboard side of the brake rotor, and an actuator that is configured to move the caliper assembly into engagement with the brake rotor; and a mass damper system having a damper mass and a damper assembly, wherein the caliper assembly is part of the damper mass, the damper assembly is connected to the knuckle, the damper assembly is connected to the damper mass, and the damper assembly is configured to regulate movement of the damper mass with respect to the knuckle to damp vibration of the wheel, wherein the first caliper part and the second caliper part are each a ring-like structure that extends around a central opening.
 8. The apparatus of claim 7, wherein the first caliper part includes a first caliper surface that is engageable with the brake rotor, the second caliper part includes a second caliper surface that is engageable with the brake rotor, and the first caliper surface and the second caliper surface are formed from a ferrous material.
 9. The apparatus of claim 7, wherein the brake rotor includes a support disk, the brake rotor includes a first rotor surface that is formed from a brake friction material, the brake rotor includes a second rotor surface that is formed from the brake friction material, the first rotor surface is located on a first side of the support disk, and the second rotor surface is located on a second side of the support disk.
 10. The apparatus of claim 9, wherein the brake friction material includes an organic material and a binder.
 11. The apparatus of claim 7, wherein a mass of the caliper assembly is greater than a mass of the brake rotor.
 12. The apparatus of claim 7, wherein a thermal mass of the caliper assembly is greater than a thermal mass of the brake rotor.
 13. The apparatus of claim 7, wherein the damper assembly includes a damper and a spring, the spring biases the damper mass toward a neutral position, and the damper resists movement of the damper mass with respect to the knuckle.
 14. The apparatus of claim 7, wherein the damper mass is connected to the knuckle by a linear bearing that restrains the damper mass to linear movement with respect to the knuckle.
 15. An apparatus, comprising: a support structure; a wheel that is rotatable with respect to the support structure; a brake rotor that is connected to the wheel for rotation with the wheel; an inner caliper plate that has a first caliper surface, wherein the inner caliper plate is located on a first side of the brake rotor; an outer caliper plate that has a second caliper surface, wherein the outer caliper plate is located on a second side of the brake rotor; an actuator that is configured to move the inner caliper plate and the outer caliper plate into engagement with the brake rotor; and a mass damper system having a damper mass and a damper assembly, wherein the inner caliper plate and the outer caliper plate are part of the damper mass, the damper assembly is connected to the support structure, the damper assembly is connected to the damper mass, and the damper assembly is configured to regulate movement of the damper mass with respect to the support structure to damp vibration of the wheel; wherein the damper mass is connected to the support structure by a linear bearing that restrains the damper mass to linear movement with respect to the support structure.
 16. The apparatus of claim 15, wherein the damper assembly includes a damper and a spring.
 17. The apparatus of claim 16, wherein the spring biases the damper mass toward a neutral position, and the damper resists movement of the damper mass with respect to the support structure.
 18. The apparatus of claim 15, wherein the brake rotor has a first rotor surface that is formed from a brake friction material and a second rotor surface that is formed from the brake friction material, wherein the brake friction material includes an organic material and a binder.
 19. The apparatus of claim 15, wherein the brake rotor has a first rotor surface that is formed from a brake friction material and a second rotor surface that is formed from the brake friction material, wherein the brake friction material is one of a non-asbestos organic brake friction material, a semi-metallic brake friction material, a ceramic brake friction material, or a sintered metal brake friction material.
 20. An apparatus, comprising: a knuckle; a wheel that is connected to the knuckle so that it is able to rotate with respect to the knuckle on a rotation axis; a brake rotor that is connected to the wheel for rotation with the wheel; a caliper assembly that is connected to the knuckle so that the caliper assembly is able to translate with respect to the knuckle, the wheel, and the brake rotor, wherein the caliper assembly includes a first caliper part that is located on an inboard side of the brake rotor, a second caliper part that is located on an outboard side of the brake rotor, and an actuator that is configured to move the caliper assembly into engagement with the brake rotor; and a mass damper system having a damper mass and a damper assembly, wherein the caliper assembly is part of the damper mass, the damper assembly is connected to the knuckle, the damper assembly is connected to the damper mass, and the damper assembly is configured to regulate movement of the damper mass with respect to the knuckle to damp vibration of the wheel, wherein a mass of the caliper assembly is greater than a mass of the brake rotor.
 21. The apparatus of claim 20, wherein the damper mass is connected to the knuckle by a linear bearing that restrains the damper mass to linear movement with respect to the knuckle.
 22. An apparatus, comprising: a knuckle; a wheel that is connected to the knuckle so that it is able to rotate with respect to the knuckle on a rotation axis; a brake rotor that is connected to the wheel for rotation with the wheel; a caliper assembly that is connected to the knuckle so that the caliper assembly is able to translate with respect to the knuckle, the wheel, and the brake rotor, wherein the caliper assembly includes a first caliper part that is located on an inboard side of the brake rotor, a second caliper part that is located on an outboard side of the brake rotor, and an actuator that is configured to move the caliper assembly into engagement with the brake rotor; and a mass damper system having a damper mass and a damper assembly, wherein the caliper assembly is part of the damper mass, the damper assembly is connected to the knuckle, the damper assembly is connected to the damper mass, and the damper assembly is configured to regulate movement of the damper mass with respect to the knuckle to damp vibration of the wheel, wherein a thermal mass of the caliper assembly is greater than a thermal mass of the brake rotor. 